48 TB of disks.
35.2 TB usable.
Phase 4. Last week the Chenbro CK23601 finally arrived. Got 12x new Samsung 2TB HDDs which became a new Z2 pool. The 1.5TB WDs went into other machines. Got 6x new WD Green 2TB HDDs and they, along with the existing WD 2TB drives, became a second Z2 pool. 48TB. 35.2TB usable
I thought RAID-Z2 uses 2 drives worth of parity, so 1.81 TB * (24 - 4) = 36.2TB. How'd you lose another TB?